/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
'use strict'

// Recursion Helper service, makes it possible to use nested directives of the same type
flowableModule.factory('RecursionHelper', [
  '$compile',
  function($compile) {
    return {
      /**
       * Manually compiles the element, fixing the recursion loop.
       * @param element
       * @param [link] A post-link function, or an object with function(s) registered via pre and post properties.
       * @returns An object containing the linking functions.
       */
      compile: function(element, link) {
        // Normalize the link parameter
        if (angular.isFunction(link)) {
          link = { post: link }
        }

        // Break the recursion loop by removing the contents
        var contents = element.contents().remove()
        var compiledContents
        return {
          pre: link && link.pre ? link.pre : null,
          /**
           * Compiles and re-adds the contents
           */
          post: function(scope, element) {
            // Compile the contents
            if (!compiledContents) {
              compiledContents = $compile(contents)
            }
            // Re-add the compiled contents to the element
            compiledContents(scope, function(clone) {
              element.append(clone)
            })

            // Call the post-linking function, if any
            if (link && link.post) {
              link.post.apply(null, arguments)
            }
          }
        }
      }
    }
  }
])
